An integrated approach to the key parameters in methanol-to-olefins reaction catalyzed by MFI/MEL zeolite materials

Chuncheng Liu, Evgeny A. Uslamin, Sophie H. van Vreeswijk, Irina Yarulina, Swapna Ganapathy, Bert M. Weckhuysen, Freek Kapteijn*, Evgeny A. Pidko

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

Identification of the catalyst characteristics correlating with the key performance parameters including selectivity and stability is key to the rational catalyst design. Herein we focused on the identification of property-performance relationships in the methanol-to-olefin (MTO) process by studying in detail the catalytic behaviour of MFI, MEL and their respective intergrowth zeolites. The detailed material characterization reveals that both the high production of propylene and butylenes and the large MeOH conversion capacity correlate with the enrichment of lattice Al sites in the channels of the pentasil structure as identified by 27Al MAS NMR and 3-methylpentane cracking results. The lack of correlation between MTO performance and other catalyst characteristics, such as crystal size, presence of external Brønsted acid sites and Al pairing suggests their less pronounced role in defining the propylene selectivity. Our analysis reveals that catalyst deactivation is rather complex and is strongly affected by the enrichment of lattice Al in the intersections, the overall Al-content, and crystal size. The intergrowth of MFI and MEL phases accelerates the catalyst deactivation rate.

Original languageEnglish
Pages (from-to)1879-1893
JournalChinese Journal of Catalysis
Volume43
Issue number7
DOIs
Publication statusPublished - 2022

Bibliographical note

Funding Information:
We acknowledge BASF and the Advanced Research Center Chemical Building Blocks Consortium (ARC CBBC) for funding under project number 2016.007.TUD.

Funding Information:
This work was supported by the BASF and the Advanced Research Center Chemical Building Blocks Consortium (ARC CBBC) for Funding under Project (2016.007.TUD).

Publisher Copyright:
© 2022 Dalian Institute of Chemical Physics, the Chinese Academy of Sciences

Keywords

  • Acidity
  • Al-distribution
  • Intergrowth MFI/MEL
  • Methanol-to-olefin conversion
  • Pentasil
  • Structure-performance relationship
  • Zeolite catalysis

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